Expansion-socket wrench



H. A. Numa.

.EXPANSION socKET, wRENcH. APPLICATION vFILED APR. 25,1922.

'1,438,39L- l Patemanec.12,'1922.

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acter which also securely Panarea Dea. 12, 1922.n

ITED A*Si HARRY NUTTER, OF SEYMOUR, INDIANA.

EXPANSION-SOCKET WRENCH.

Application filed April 25, 1922. Serial No. 556,432.

ToaZZwhom/tmay com/cem:

Be it known that I, HARRY A. NU'ITER, a citizen ofthe United States, and a resident of Seymour, inA the county of Jackson and State I of. Indiana, have invented certain new and useful Improvements. in Expansion-Socket Wrenches, of which the -followin isa full, clear, and exact description.

y invention relates to expansion socket wrenches, and one .of the objects of the 1nvention is to provide a device of this charhold bits or other tools of various sizes. l' Another obj ect of the invention is to provide a device of this character which is adapted to beA used wi'h brace or drill sockets of various sizes.

A further purpose ofthe invention. is to provide a device ofthis character which 1s not only strong and durable, butalso 1s simple in construction and inexpensive in mannfacture.

Other and further objects and advantages of the invention will be apparent to those skilled in the art from the following detailed description, when taken in connection with the accompanying drawings, in which:

Figure 1 is a side elevation of the completed device, the resilient arms being closed to their full extent..

Figure 2 is a longitudinal sectional view through the device, the resilient arms being closed to their full extent.

Figure 3 is a vertical transverse sectional view taken on line 3 3 of Figure 2.

Fi ure 4 is a detail view of the gripping mem er. carrying the resilient arms, the clamping sleeve being indicated in dotted lines; and y Figure 5 is a fragmentary perspective view of the 4gripping member and one of the resilient arms, the gripping member bein in section. l v

- eferring to the drawings more in detail, numeral 1 indicatesa body member which is screw threaded for a portion of its length, and screw threadedly engaged therewith is a clamping sleeve 2.

A gripping member 3 has a projection 4 thereon, and the projection screw threadedly engages the wall of a recess provided in the body member. Further means for attaching the gripping member to the' body member and for preventing relative rotation between the two members consists of a lock-screw 5 which screw threadedly engages the body member and the gripping member; locknuts 6 being disposed on the end of the lock-screw. ,y

The gripping member is shown a`scarr`y4 ing four resilient arms indicated by numeral 7 These arms, when not restrained,

spring outwardly to the position shown in Figure 4. While I'have shown four of the resilient arms, it will be understood, of course, that a greater or lesser number may be employed. On the end of each resilient arm is' a jaw 8, and each jaw is provided with a right angular channel 9.

The operation of the apparatus described is as follows:

By rotating the clamp-in member to move it to the left (Figure 2) t e spring arms 7 are released and' automatically spring outwardly. A bit or other tool is then placed in the jaws carried by the resilient arms and the clampin sleeve 1s rotated to carry it to the right igure 2), whereby the clamp-ing sleeve engages the resilient arms, forcing them towar s each other, and the jaws grip the bit or other tool and hold it firmly.

v The body opposite end and the wall of said recess is screw threaded, as indicated by numeral 10.l An adjustable holder 11 has a projection 12 which lis screw threadedly engaged in the recess and locked therein by means of the thus far I' member 1 is also recessed at the i lock-screw 13.v The holder is rendered adjustable by means of being split, as indicated by numeral 14, and a wing 15 is provided on the holder on each side of the slot. An adjusting screw 16 engages the wings and clamps the holder on the brace or drill socket member. ,It is thus apparent that the device may be clamped on brace or drill socket members of various sizes. A

From the foregoing detailed description it will be obvious that I have invented an,

What l claim as new und desire to secure by Letters Patent is: 4

v l. A device of the eherzwter described, including e body member, uni adjustable holder screw threadedly mounted on one end thereof, und u gripping member screw threadedly mounted on the other end there of, resilient arms carried by the gripping member, 'uws carried by the resilient nrms, and a. clump-ing sleeve serew` threudedly 'mounted on seid body member und engaging the resilient arms.

2. A. device of the character described, including' n. body member provided `with a recess in euch end thereof, un adjustable holder screw threudedly mounted in one of said recesses, und e rip-pingf member screw threadedly mounted in the other of seid recesses, resilient arms carried by the grip ping member, jewsV carried by the resilient arms, und e elempin r sleeve screw threadedly mounted on thelhody member and enraging the resilient arms. i

device of the character described, including e body member provided with a, in euch. end thereof, an adjustable holder screw threededly mounted in one of seid recesses, und n gripping member screw threadedly mounted in the other of said recesses, n lock screw engaging the body member and the ripping member, a leek nut provided on tig-lie lock screw, resilient arms carried by` the grippng member, jaws carried by the resilient arms, and n, clamping sleeve ser w threadedly mounted en the body member und engaging the resilient arms.

HARRY A. NUTTER. 

